Answer:
Bro this is how I understood it 
Explanation:
11/12-2/3=1/4 
1 5/8-1 4/7=3/56 
By:nick 
Yo sorry am on my gbf account and I have this app on my phone tht could help out but sense I am on hers I don’t understand tht type of math no more long time sense I saw them number’s ..